Max Verstappen has been dropped from third to fifth in the Mexican Grand Prix, thanks to a five-second penalty for gaining an advantage during his fight with Sebastian Vettel in the closing stages of the race.

Vettel's podium, however, is also in doubt, as the Ferrari driver is under investigation for moving under breaking when defending from Daniel Ricciardo.

The Dutchman was running in third place ahead of the rapidly closing Vettel when he locked up at Turn 1 on lap 68 and ran across the grass run-off area to hold on to the position.

Despite being advised by his Red Bull team to give the position back, and Vettel speaking furiously over the radio about what happened – the Dutchman held on for third.

A note from the stewards said that the incident would be investigated after the race.

Within seconds of the finish though, it was announced that Verstappen was given a five-second penalty, dropping him to fifth behind Vettel and Ricciardo.

After the chequered flag, Vettel moved across and gesticulated to Verstappen to make clear his displeasure about what had happened.

Verstappen's move across the grass at Turn 1 was similar to what happened to Lewis Hamilton on the opening lap when he locked up and ran across the run-off area to hold on to his lead.